What is the current flow on Mongaup River?

Mongaup River was running 203 cubic feet per second as of Aug 1, 2026, 6:15 PM UTC, measured at USGS gauge 01433500. This is a build-time snapshot rather than a live reading — check the USGS gauge directly before relying on it.

What is the water temperature on Mongaup River?

70.9°F (21.6°C) as of Aug 1, 2026, 6:15 PM UTC, at USGS gauge 01433500. Mongaup River carries no state trout classification, so the trout-stress thresholds do not apply to it — this is a water temperature measurement, not a fishery judgement.

Mongaup River

New York. Streamflow and water-temperature readings from USGS gauges. Running 203 cfs as of Aug 1, 2026, 6:15 PM UTC.

Latest Reading

203

cubic feet / second

70.9°F

water temperature (21.6°C)

USGS gauges

Flow measured Aug 1, 2026, 6:15 PM UTC at gauge 01433500. Temperature measured Aug 1, 2026, 6:15 PM UTC at gauge 01433500. These are build-time snapshots, not a live feed — check the USGS gauge before relying on them.

USGS Gauges on Mongaup River

Gauge	Station	Water temp?
01432900	MONGAUP RIVER AT MONGAUP VALLEY NY	—
01433005	MONGAUP R BELOW SWINGING BRIDGE RESERVOIR NY	Yes
01433500	MONGAUP RIVER NEAR MONGAUP NY	Yes

Fly fishing rivers →New York lakes →

Conditions: USGS NWIS (public domain).